不韋 呂 / F746_MySoundMachine

Integrated program of 4 different kinds of application programs for processing sound signal. 4種類のサウンド信号処理を統合したプログラム．

Dependencies:   F746_GUI F746_SAI_IO FrequencyResponseDrawer SD_PlayerSkeleton UIT_FFT_Real

mbed_src_STM32F7/common/I2C.cpp@2:fcba17e3d573, 2016-09-26 (annotated)

Committer:
MikamiUitOpen
Date:
Mon Sep 26 07:07:05 2016 +0000
Revision:
2:fcba17e3d573
Parent:
mbed_src_STM/common/I2C.cpp@0:224dccbc4edd 
3

Who changed what in which revision?

UserRevisionLine numberNew contents of line
MikamiUitOpen 0:224dccbc4edd 1 /* mbed Microcontroller Library
MikamiUitOpen 0:224dccbc4edd 2 * Copyright (c) 2006-2015 ARM Limited
MikamiUitOpen 0:224dccbc4edd 3 *
MikamiUitOpen 0:224dccbc4edd 4 * Licensed under the Apache License, Version 2.0 (the "License");
MikamiUitOpen 0:224dccbc4edd 5 * you may not use this file except in compliance with the License.
MikamiUitOpen 0:224dccbc4edd 6 * You may obtain a copy of the License at
MikamiUitOpen 0:224dccbc4edd 7 *
MikamiUitOpen 0:224dccbc4edd 8 * http://www.apache.org/licenses/LICENSE-2.0
MikamiUitOpen 0:224dccbc4edd 9 *
MikamiUitOpen 0:224dccbc4edd 10 * Unless required by applicable law or agreed to in writing, software
MikamiUitOpen 0:224dccbc4edd 11 * distributed under the License is distributed on an "AS IS" BASIS,
MikamiUitOpen 0:224dccbc4edd 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
MikamiUitOpen 0:224dccbc4edd 13 * See the License for the specific language governing permissions and
MikamiUitOpen 0:224dccbc4edd 14 * limitations under the License.
MikamiUitOpen 0:224dccbc4edd 15 */
MikamiUitOpen 0:224dccbc4edd 16 #include "I2C.h"
MikamiUitOpen 0:224dccbc4edd 17
MikamiUitOpen 0:224dccbc4edd 18 #if DEVICE_I2C
MikamiUitOpen 0:224dccbc4edd 19
MikamiUitOpen 0:224dccbc4edd 20 namespace mbed {
MikamiUitOpen 0:224dccbc4edd 21
MikamiUitOpen 0:224dccbc4edd 22 I2C *I2C::_owner = NULL;
MikamiUitOpen 0:224dccbc4edd 23
MikamiUitOpen 0:224dccbc4edd 24 I2C::I2C(PinName sda, PinName scl) :
MikamiUitOpen 0:224dccbc4edd 25 #if DEVICE_I2C_ASYNCH
MikamiUitOpen 0:224dccbc4edd 26 _irq(this), _usage(DMA_USAGE_NEVER),
MikamiUitOpen 0:224dccbc4edd 27 #endif
MikamiUitOpen 0:224dccbc4edd 28 _i2c(), _hz(100000) {
MikamiUitOpen 0:224dccbc4edd 29 // The init function also set the frequency to 100000
MikamiUitOpen 0:224dccbc4edd 30 i2c_init(&_i2c, sda, scl);
MikamiUitOpen 0:224dccbc4edd 31
MikamiUitOpen 0:224dccbc4edd 32 // Used to avoid unnecessary frequency updates
MikamiUitOpen 0:224dccbc4edd 33 _owner = this;
MikamiUitOpen 0:224dccbc4edd 34 }
MikamiUitOpen 0:224dccbc4edd 35
MikamiUitOpen 0:224dccbc4edd 36 void I2C::frequency(int hz) {
MikamiUitOpen 0:224dccbc4edd 37 _hz = hz;
MikamiUitOpen 0:224dccbc4edd 38
MikamiUitOpen 0:224dccbc4edd 39 // We want to update the frequency even if we are already the bus owners
MikamiUitOpen 0:224dccbc4edd 40 i2c_frequency(&_i2c, _hz);
MikamiUitOpen 0:224dccbc4edd 41
MikamiUitOpen 0:224dccbc4edd 42 // Updating the frequency of the bus we become the owners of it
MikamiUitOpen 0:224dccbc4edd 43 _owner = this;
MikamiUitOpen 0:224dccbc4edd 44 }
MikamiUitOpen 0:224dccbc4edd 45
MikamiUitOpen 0:224dccbc4edd 46 void I2C::aquire() {
MikamiUitOpen 0:224dccbc4edd 47 if (_owner != this) {
MikamiUitOpen 0:224dccbc4edd 48 i2c_frequency(&_i2c, _hz);
MikamiUitOpen 0:224dccbc4edd 49 _owner = this;
MikamiUitOpen 0:224dccbc4edd 50 }
MikamiUitOpen 0:224dccbc4edd 51 }
MikamiUitOpen 0:224dccbc4edd 52
MikamiUitOpen 0:224dccbc4edd 53 // write - Master Transmitter Mode
MikamiUitOpen 0:224dccbc4edd 54 int I2C::write(int address, const char* data, int length, bool repeated) {
MikamiUitOpen 0:224dccbc4edd 55 aquire();
MikamiUitOpen 0:224dccbc4edd 56
MikamiUitOpen 0:224dccbc4edd 57 int stop = (repeated) ? 0 : 1;
MikamiUitOpen 0:224dccbc4edd 58 int written = i2c_write(&_i2c, address, data, length, stop);
MikamiUitOpen 0:224dccbc4edd 59
MikamiUitOpen 0:224dccbc4edd 60 return length != written;
MikamiUitOpen 0:224dccbc4edd 61 }
MikamiUitOpen 0:224dccbc4edd 62
MikamiUitOpen 0:224dccbc4edd 63 int I2C::write(int data) {
MikamiUitOpen 0:224dccbc4edd 64 return i2c_byte_write(&_i2c, data);
MikamiUitOpen 0:224dccbc4edd 65 }
MikamiUitOpen 0:224dccbc4edd 66
MikamiUitOpen 0:224dccbc4edd 67 // read - Master Reciever Mode
MikamiUitOpen 0:224dccbc4edd 68 int I2C::read(int address, char* data, int length, bool repeated) {
MikamiUitOpen 0:224dccbc4edd 69 aquire();
MikamiUitOpen 0:224dccbc4edd 70
MikamiUitOpen 0:224dccbc4edd 71 int stop = (repeated) ? 0 : 1;
MikamiUitOpen 0:224dccbc4edd 72 int read = i2c_read(&_i2c, address, data, length, stop);
MikamiUitOpen 0:224dccbc4edd 73
MikamiUitOpen 0:224dccbc4edd 74 return length != read;
MikamiUitOpen 0:224dccbc4edd 75 }
MikamiUitOpen 0:224dccbc4edd 76
MikamiUitOpen 0:224dccbc4edd 77 int I2C::read(int ack) {
MikamiUitOpen 0:224dccbc4edd 78 if (ack) {
MikamiUitOpen 0:224dccbc4edd 79 return i2c_byte_read(&_i2c, 0);
MikamiUitOpen 0:224dccbc4edd 80 } else {
MikamiUitOpen 0:224dccbc4edd 81 return i2c_byte_read(&_i2c, 1);
MikamiUitOpen 0:224dccbc4edd 82 }
MikamiUitOpen 0:224dccbc4edd 83 }
MikamiUitOpen 0:224dccbc4edd 84
MikamiUitOpen 0:224dccbc4edd 85 void I2C::start(void) {
MikamiUitOpen 0:224dccbc4edd 86 i2c_start(&_i2c);
MikamiUitOpen 0:224dccbc4edd 87 }
MikamiUitOpen 0:224dccbc4edd 88
MikamiUitOpen 0:224dccbc4edd 89 void I2C::stop(void) {
MikamiUitOpen 0:224dccbc4edd 90 i2c_stop(&_i2c);
MikamiUitOpen 0:224dccbc4edd 91 }
MikamiUitOpen 0:224dccbc4edd 92
MikamiUitOpen 0:224dccbc4edd 93 #if DEVICE_I2C_ASYNCH
MikamiUitOpen 0:224dccbc4edd 94
MikamiUitOpen 0:224dccbc4edd 95 int I2C::transfer(int address, const char *tx_buffer, int tx_length, char *rx_buffer, int rx_length, const event_callback_t& callback, int event, bool repeated)
MikamiUitOpen 0:224dccbc4edd 96 {
MikamiUitOpen 0:224dccbc4edd 97 if (i2c_active(&_i2c)) {
MikamiUitOpen 0:224dccbc4edd 98 return -1; // transaction ongoing
MikamiUitOpen 0:224dccbc4edd 99 }
MikamiUitOpen 0:224dccbc4edd 100 aquire();
MikamiUitOpen 0:224dccbc4edd 101
MikamiUitOpen 0:224dccbc4edd 102 _callback = callback;
MikamiUitOpen 0:224dccbc4edd 103 int stop = (repeated) ? 0 : 1;
MikamiUitOpen 0:224dccbc4edd 104 _irq.callback(&I2C::irq_handler_asynch);
MikamiUitOpen 0:224dccbc4edd 105 i2c_transfer_asynch(&_i2c, (void *)tx_buffer, tx_length, (void *)rx_buffer, rx_length, address, stop, _irq.entry(), event, _usage);
MikamiUitOpen 0:224dccbc4edd 106 return 0;
MikamiUitOpen 0:224dccbc4edd 107 }
MikamiUitOpen 0:224dccbc4edd 108
MikamiUitOpen 0:224dccbc4edd 109 void I2C::abort_transfer(void)
MikamiUitOpen 0:224dccbc4edd 110 {
MikamiUitOpen 0:224dccbc4edd 111 i2c_abort_asynch(&_i2c);
MikamiUitOpen 0:224dccbc4edd 112 }
MikamiUitOpen 0:224dccbc4edd 113
MikamiUitOpen 0:224dccbc4edd 114 void I2C::irq_handler_asynch(void)
MikamiUitOpen 0:224dccbc4edd 115 {
MikamiUitOpen 0:224dccbc4edd 116 int event = i2c_irq_handler_asynch(&_i2c);
MikamiUitOpen 0:224dccbc4edd 117 if (_callback && event) {
MikamiUitOpen 0:224dccbc4edd 118 _callback.call(event);
MikamiUitOpen 0:224dccbc4edd 119 }
MikamiUitOpen 0:224dccbc4edd 120
MikamiUitOpen 0:224dccbc4edd 121 }
MikamiUitOpen 0:224dccbc4edd 122
MikamiUitOpen 0:224dccbc4edd 123
MikamiUitOpen 0:224dccbc4edd 124 #endif
MikamiUitOpen 0:224dccbc4edd 125
MikamiUitOpen 0:224dccbc4edd 126 } // namespace mbed
MikamiUitOpen 0:224dccbc4edd 127
MikamiUitOpen 0:224dccbc4edd 128 #endif